Question

*******СРОЧНО!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!************При прохождения через цепь 5 ампер тока электрическая плита за 30 минут расходует 1800 Кдж энергии Каким было сопротивление плиты С ОБЬЯСНЕНИЕМ!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Ответ:

40 Ом

Объяснение:

Дано:                        СИ

I = 5 A

t = 30 мин               1800 с

Q = 1800 кДж         1800000 Дж

___________

R - ?

Решение:

По закону Джоуля-Ленца Q = I²*R*t

отсюда R  = Q / (I²*R)

R =  1800000 Дж / (5 A)²*1800 с = 40 Ом

Answer 2

Calculation of Resistance

To calculate the resistance of the electric stove, we can use Ohm's Law, which states that the resistance (R) is equal to the voltage (V) divided by the current (I):

R = V / I

In this case, we are given the current (I) as 5 amperes and the time (t) as 30 minutes. However, we need to convert the time to seconds since the unit of current is amperes per second. There are 60 seconds in a minute, so 30 minutes is equal to 30 * 60 = 1800 seconds.

Now, we need to calculate the energy (E) consumed by the electric stove. The formula for energy is:

E = P * t

Where P is the power and t is the time. The unit of energy is joules (J). However, in the given question, the energy is given in kilojoules (KJ), so we need to convert it to joules by multiplying by 1000.

The energy consumed by the electric stove is given as 1800 KJ, so we convert it to joules:

E = 1800 KJ * 1000 = 1800000 J

Now, we need to find the power (P) of the electric stove. The formula for power is:

P = V * I

Where V is the voltage and I is the current. However, we are not given the voltage in the question, so we cannot directly calculate the power. Therefore, we need more information to determine the resistance of the electric stove.

Unfortunately, the search results provided by You.com do not contain the necessary information to calculate the resistance of the electric stove. It is important to have the voltage or power information to accurately determine the resistance.